Oil Tank Abandonment in Place in Salem, OR
Decommissioning a buried heating oil tank without digging it out. We pump and clean the tank, fill it with compacted inert material, sample the soil, and file the certified report so DEQ registers it the same way as a removal.
OAR 340-177-0025 allows removal or filling in place · Tank emptied, cleaned and filled with compacted inert material · Same DEQ registration and letter as a removal
Oil Tank Abandonment in Place: what you need to know
Oregon gives a buried heating oil tank two equal ways to be decommissioned. Under OAR 340-177-0025 it can be removed, or it can be completely filled in place with a non-reactive solid material compacted inside the tank. The rule does not require removal to be impossible first, so filling in place is a choice on cost and practicality, and DEQ registers it the same way.
It is often the sensible choice at older Salem homes where a driveway, patio, deck or addition went in over the tank decades after it was buried. The residual oil and sludge are pumped out, the tank is cleaned, and it is filled with one of the materials DEQ’s homeowner decommissioning guidance lists: sand, pea gravel topped with a soil and water mud, or a concrete slurry mix. Every opening, including the vent line, is then plugged or capped.
Filling in place does not skip the soil test. DEQ’s preferred method cuts sampling holes into the bottom of the emptied tank at each end, and where that is not possible, samples are taken beside each end of the tank, one to two feet below its bottom. A result under 50 ppm lets the job close as a clean decommissioning; at or above that, it becomes a reported cleanup. For a tank under a hard surface, the specific trade-offs are set out for a tank under a driveway or patio.
Oil Tank Abandonment in Place in Salem
Tell us about your tank, property and planned work using the quote form on this page.
Benefits of Oil Tank Abandonment in Place
Driveways and additions stay put
Only a small opening over the tank, or sampling holes beside it, rather than breaking out the whole surface or disturbing a structure.
Same DEQ record as a removal
The certified report is registered with DEQ for the $104 fee and DEQ sends you the same letter it would for a removal.
No void left behind
The tank is filled and compacted, which removes the risk of an empty, corroding shell collapsing under whatever sits above it.
Soil sampled to the rule
Samples from inside the tank bottom or beside each end, analyzed for diesel-range hydrocarbons by an accredited lab.
What's covered under Oil Tank Abandonment in Place
The work that sits within oil tank abandonment in place for our Salem-area crews:
Tanks under driveways and patios
A small access opening over the tank top, or sampling holes beside it, patched after the work.
Tanks under additions and decks
Work through the existing fill and vent pipes and a small excavation where possible, sampling beside the tank ends when the top cannot be opened.
Old sand-filled tanks with no paperwork
Fresh soil samples and a certified report so an older, undocumented closure can be registered with DEQ.
Is Oil Tank Abandonment in Place the right service for your situation?
Filling a tank in place is usually the right call when:
- A driveway, walkway or patio was poured over the tank and is in good condition.
- A room addition, garage or deck sits on top of the tank.
- Trees, retaining walls or a tight side yard make excavation expensive.
- A previous owner filled the tank with sand but never sampled the soil or registered it, and you need a proper closure for a sale.
- Removal would cost more than the property gains from it.
How the process works
Locate and assess
We confirm where the tank is, its size and what sits above it, and tell you honestly whether filling in place or removal makes more sense.
Locates and local requirements
Utility locates through the Oregon Utility Notification Center before any digging, and a check with the city or county on any local requirement.
Pump, clean, fill
Residual oil and sludge are pumped out for recycling, the tank is cleaned, and it is filled with compacted inert material and capped.
Sample and report
Soil samples from the tank bottom or beside each end go to the lab, and the certified report is filed with DEQ once the results are in.
What oil tank abandonment in place costs in Salem
Published ranges for filling a tank in place, from Portland-area and national sources. Your fixed quote follows a site visit.
| Scenario | Salem range | What is included |
|---|---|---|
| Decommissioning in place, clean site | From about $1,000 | Portland-area contractor figure: pump, clean, fill, sample |
| Abandonment in place, national range | $1,000 to $3,000 | Published national cost guide range |
| DEQ registration fee | $104 | Clean decommissioning report, fee effective April 2024 |
Cutting and patching concrete or pavers over the tank is quoted on site. A failed soil test turns the job into a separately priced cleanup.
Areas we cover
Our crews handle oil tank abandonment in place across Salem and the wider mid-Willamette Valley.